We tend to think of heroes as larger-than-life figures who accomplish physical feats, such as the man who pulled two women trapped in a car from the Colorado floods, or the policeman who rescued a woman and her two children from the mall under fire in Nairobi. And those rescuers are indeed heroic, but we should also be thinking about …

Medical students have long used rhymes and songs to help them master vast quantities of information, and we’ve just gotten fresh evidence of how effective this strategy can be. A young British doctor, Tapas Mukherjee of Glenfield Hospital in Leicester, was distressed by a survey showing that 55% of nurses and doctors at Glenfield were …